So you create a many-to-many relationship and add data to it, then you want to run an Advanced Find filtered on that relationship. But when you run the advanced find, you don’t get any results. What’s up?

The reason you don’t get anything back is because you have the relationship set to not display in the navigation area. Update your relationship to display on both sides of the relationship, and you will be able to filter advanced find off of the relationship and return results.

Thue,
You can filter advanced find based on multiple N:N relationships, If you are doing an “And” query–get me everything where this AND that are correct. With advanced find you can’t do related entity “or” filters, or “not in” filters. You can if you do Fetch XML surgery, but not through OOTB advanced find.